Jul 5 – 10, 2021
Europe/Rome timezone

Precision isotope-shift spectroscopy in neutral Yb and joint Yb/Yb$^+$ King-plot analysis

Jul 5, 2021, 4:30 PM
30m
Invited talk in the parallel session Variation of the fundamental constants, tests of the fundamental symmetries and probes of the dark sector Variation of the Fundamental Constants, Tests of the Fundamental Symmetries and Probes of the Dark Sector

Speaker

Dr Dionysios Antypas (Johannes Gutenberg-Universität Mainz, Helmholtz-Institut Mainz, Mainz 55128, Germany)

Description

The isotope shifts (IS) in the frequency of an atomic transition are approximately linearly correlated with the shifts in another transition. This linearity is reflected in the so-called King-plot analysis. It has been suggested to search for deviations from linearity as a way to probe beyond-Standard-Model interactions mediated by light bosons [1]. These searches require availability of precision IS data in a chain of isotopes of a given element. In a recent report on precision spectroscopy in a pair of Yb$^+$ transitions [2], a large nonlinearity was observed in the King-plot, that primarily arises due to the quadratic field shift [2], or the influence of the nuclear deformation on the field shift [3]. Further availability of precision IS data in the same element is crucial to check modeling of the cause of the nonlinearity [3], and potentially separate within Standard-Model effects from possible new physics contributions to the nonlinearity [4].
We will discuss an experiment involving precision spectroscopy of the $^1S_0-^1D_2$ optical transition in neutral Yb, in order to determine the IS in the naturally abundant, nuclear-spin zero Yb isotopes. We will present our preliminary experimental results, and show a joint King-plot of our data combined with those on Yb$^+$, that reveals an order of magnitude larger nonlinearity, compared to that of the Yb$^+$ work.

[1] J. C. Berengut, et al., Phys. Rev. Lett. 120,091801 (2018).
[2] I. Counts, J. Hur, D. P. L. Aude Craik, H. Jeon, C. Leung, J. C. Berengut, A. Geddes, A. Kawasaki, W. Jhe,and V. Vuletic, Phys. Rev. Lett. 125, 123002 (2020).
[3] Saleh O. Allehabi, V. A. Dzuba, V. V. Flambaum, and A. V. Afanasjev. Phys. Rev. A 103, L030801 (2021).
[4] J. C. Berengut, C. Delaunay, A. Geddes, and Y. Soreq, Phys. Rev. Research 2, 043444 (2020)

Primary authors

Dr Dionysios Antypas (Johannes Gutenberg-Universität Mainz, Helmholtz-Institut Mainz, Mainz 55128, Germany) Mr Nathaniel Figueroa (Johannes Gutenberg-Universität Mainz, Helmholtz-Institut Mainz, Mainz 55128, Germany) Julian Berengut (University of New South Wales, School of Physics, Sydney 2052, Australia) Vladimir Dzuba (University of New South Wales, School of Physics, Sydney 2052, Australia) Prof. Victor Flambaum (University of New South Wales, School of Physics, Sydney 2052, Australia) Prof. Dmitry Budker (Johannes Gutenberg-Universität Mainz, Helmholtz-Institut Mainz, Mainz 55128, Germany)

Presentation materials